Magneto-machine.



H. H. WIX'ON.

MAGNETO MACHINE. Y APPLICATION ,FILED DEC. @1910. 1,176,805. PatentedMar. 28,1916.

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H. HJWIXON.

MAGNETO MACHINE.

APPLICATION FILED DEC. 17,1910.

Patented Mar. 28, 1916.

48 7 M45 5 3 4 nu/ 3 2 .Mm 9 .I 5 W9) I\ E QIJ 3 6 5 6 M InveTc-m HowardH. IlI/'IIXIIIl-lfv Wl messes 107 Original application led Manch 4,1910, Serial No. 547,190. Divided. and this application fried UNITED'sTATEs PATENT HowAriD H. WIXON, OF CHICAGO, ILLINOIS, ASSIGNOR TOSTROMBERG MOTOR DEVICES COMPANY, OF CHICAGO, ILLINOIS, A OORPORTION 01E'ILLINOIS.

MAGNETO-MACHINE.

Specification of Letters Eatent.

Patented Mar. 8,1ttn.

lecember 17, 1910. Serial No. 597,741.

To all whom z't may concern.' Be it known that I, HOWARD H.,W1X0N, acitizen of the United States, residing at Chicago, in the county of Cookand State of Illinois, having invented a certain new and usefulImprovement in Magneto-'Machines, of' which the following is a full,clear, concise, and exact description, reference being had to theaccompanyingdrawings, forming a part df this specication.

)1y invention relates to electric generators and its object is toprovide sucha device 1n which the various parts are arranged with greatcompactness, presenting a structure occupying a 'comparatively smallamount of 'space without sacrificing anything in the line of efficiency,thereby securing many mechanical and electrical advantages.

The main feature of my invention is the provision of a stationaryinduction winding, having both primary and secondary coils.

Other features will be readily understood by consideration of thestructure shown in the accompanying drawings, in which- Figure 1 is alongitudinal sectional view and Fig. 2 is a transverse sectional viewtaken approximately on, the plane of the line 2 2 of Fig. 1 and lookingin the direction indicated by the arrows.

This case is divisional from my copending application Serial,#5fl7190filed March 4, 1910. Y

Referring to the drawings, the main framework of the machine comprises anonmagnetic base portion 1, a pair of magnetic side portions Q, 2, anon-magnetic top portion 3, and supporting end plates 4t and 5, all heldtogether in some suitable manner, for instance, by means of screws 6, 6.The permanent magnets 7, 7 are in good m`agnetic contact with the sidepieces 2, and, extending upwardly, embrace some of the working parts ofthe machine, as is usual in the art. The main framework thus describedhas the central cylindrical bore or space 8, the sides of which form thepolar faces 9, 9. In this cylindrical space within the framework isarranged a stationary induction y means is provided, which, in

side of the coils, as indicated cross section ally in Fig. 1. Thisinduction winding is a unitary part which may be readily inserted inplace in the magneto and as readily withdrawn therefrom, after the otherparts located in the. cylindrical spacing have been removed, as willhereinafter appear. The cylindrical ridge 13 on the outside of thewinding is just sufliciently smaller in diameter than the space in theframework to permit the winding being inserted within the framework 'andheld stationarily therein. 1n order to properly guide the winding inplace when it is inserted within the framework fof the magneto, suitableguiding the specific instance shown, consists of a lug 14, carried bythe winding, and coperating groove 15, provided at a suitable point onthe framework within the cylindrical space', as clearly illustrated inFig. 2. vAs a further locking means for the winding when in place, alspring pressed lug 16 supported in the framework by the screw threadedtube 17 is .adapted to enter a recess 18 in the peripheral ridge of thewinding. Upon withdrawal of the winding, the yielding lug 16 will beforced out of the recess. By thus providing guiding and locking meansfor the winding, it will always be possible to place thewinding on themachine in exactly the same position.. This is important when it isconsidered that` soV the same with respect to thecon# by some suchsuitable guiding 'and locking means as above described.

Passing axially through the-winding. is

the armature shaft 19, rotatably supportedl in bearings QOand 21. Thebearing 20y is carried by thesupplementary end platef22,

screwed to ytheframework of the machine by means of screws 23 and thebearing 21v is.

mounted in the support 23, which is clamped.

.these scre\v.-tl 1readed portions, setscrews 29 and 30 being providedon the inductor members to prevent accidental disarrangement of .thepolar extensions after they have been fastened in position on thearmature shaft.l

Any other approved means of securing these inductor members to thearmature shaft may be obviously7 employed, although the screwthreadedarrangement between the parts has the advantage of readily permittingaxial as `well as radial adjustment ,of the iniductor members on thearmature shaft. rlihe inductor members, as well as the armature shaftare of magnetic material-at least that portionof the armature shaftwhich1s included between the inductor members. It will 'therefore be seenthat the armature shaft constitutes a rotatable magnetic core for the,stationary induction winding. The angular position of the inductormembers 25 and 26 on thel armature shaft is such that they liesubstantially diametrically opposite, as indicated. in F ig. l.. Inorder .to provide a large surface on faces of the indu'ctor members, Ipreferably form the latter substantially as shown in .F ig. l, fromwhich it will be seen lthat the inductor members are provided with axialelongations 3l and 32, respectively, these elongations project intospaces 33 formed between the winding and the sur! rounding surface ofthe main framework. By this arrangement the lengthv of the machine isreduced, since, if the elongations of the inductor members projectedoutwardly away from each other, it would be necessary to lengthen thepole pieces accordingly, or else materiallyv reduce the length of the inlduction winding, and thusreduce the elliciency of the machine.

The operation of the machine thus far described will be apparent tothose skilled in the art. As the armature is rotated or oscillated, themagnetic flux of the field will be periodically short circuited throughthe winding, first in the one direction and then in the reversedirection. This short circuiting of the flux ta kes place when theinductor members are moving opposite the pole pieces. as indicated inFig. 2. where the polar eX- tension 26 is shown in a yposition 90o fromthe position indicated in Fig. 1. lVhen the armature is in the positionshown in Fig. 2, the magnetic flux will pass, (assuming the poles of themagnets as indicated b v N and -S,) fromthepnorth pole piece, intheinductor member ,25, through the winding in a direction away from theobserver. returnim by way of the inductor member QG to tho opposite polepiece. lithen the armature is in-a position 180 from that indicated inFig. QLthe magnetic 'flux will be reversed through the stationarywinding, passing from the north pole piece into the induclor member 2G,through the armature in a direction toward the observer, and .returningthrough ,thepolar extension into the south pole piece.

lVhen the inductor is set nrrotatixLman electromotive force is inducedin the winding hyp-the action ofthe field magnet. lf now the primaryvcoil is short circuited, the eurrent flowing therethrough vgenerateslines of magneticv force which largely neutralizes the existing magnetic`ield--that is, they force back or oppose a change of .magnetism throughthe coil. As soon as the circuit in the primary is broken, thecoi'interaction of the eneratedv opposing l'lux ceases. Gering' to thechange which therel'iy instantaneously arises in the mimber of the linesot force passing through the second a ry coil from the field magnets,the potential rises so high .in the secondary coil that a spark isproduced across the spark plug to ignite the explosive mixture in theengine cylinder.

rEhe wire in the primary coil is comparatively coarse. and comprisescomparatively few turns, I.while the wire .constituting the secondarycoil is comparativel) line and comprises a comparatively large number ofturns, .in vorder that the electromotive .force generated in thesecondary coil mayvbe Sulliciently high to cause sparking at theA sparkplugs of the engine cylinders. This is armatter of mere n'iathen'iaticalcalculationtothose skilled in the art. and no further explanation isnecessary here on that point. 'T he flux-carrying portion of thearmature shaft is laminated a ill in order to obviate or. reduce to aminimum the eddy currents set` up by the flux variations` Thisavoidsundue heating ofthe armature metal Aand consequent waste of energy. Thelaminations lie, of course, in the plane of the -inductor ymembers ofthe armature, Las indicated in the drawings. In order to sacrificenothing of the rigidity ofthe armature shaft, only the major portion ofthe latter is laminated, the laminations 3ft bein secured in thecut-away portion The armature shaft 19 has an extension 36, to which isrigidly secured-the yoke 37, having at its oppositeends a pair ofrollers 38 and 39. AThese rollers are insulated from the yoke, asclearly shown in Fig. l. The yoke constitutes the movable Contact memberof an interrupter when the device `is used for-sparlnng purposes, thisinterrollers 38 and 39 coperate with movable' contact springs 40 and 41associated with stationary contacts (not shown) to break the primary.circuit of an ignition system periodically.

When the device of my invention is used for ignition purposes, it isnecessary that some sort of a distributer be employed when amulti-cylinder engine is associated therewith. The distributerillustrated in the drawings comprises the subject matter of my copendingapplication Serial #580,718, filed Sept. 6th, 1910, which case'is alsodivisional from my copending application serial #541,190, tied March4th, 1910. In.

this description suffice it to that a plurality of contacts arestationarilymounted in the insulating casing 42, secured to the endplate 5 means of screws 43. The contacts are individually connected withthe respective spark plugs by means of suitable leads. An auxiliaryshaft 44 is mounted in the bearings 45 and 46, set into end plates y 4and 5, respectively, anti-friction balls 47,

47 being provided, and carries the gear 48 incased between the end plate4 and supplevmentary end plate 22. This gear meshes with the pinion 49secured upon the main shaft 19. The auxiliary shaft 44 beyond thebearing 46carries the insulating block 50,

which operates in a circular pocket 51 in the casing42, this pocketbeing covered by a mica plate 52. The insulating block 50 carries thecontact member 53, Whichis adaptedto contactsuccess'ively with therotary contacts, all. as shown and described in detail in my copendingapplication last referred to. The insulating block 50 also' carries aspark electrode 54, which is spaced from a metallic point l55 on theauxiliary shaft to form a spark gap, which is described in my copendingapplication just referred to as a combined safety and testing spark gapthe auxiliary shaft 44 is provided with a central insulating portion 56and the parts just referred to are connected in circuit with thewindings of the stationary induction coil by means of the ring 57 andplungers 58 and 59, the pin 60 connecting the plunger 58 with' themetallic partof the auxiliary shaft. The plunger 59 is connected withone terminal of the secondary coil by contacting with the end of thecoil which is run out to the surface, as indicated by the conductor 61,the other end of this coil being connected with the machine frame. Thesame general construction is employed in. connecting one terminal of theprimary winding with the plug in the bottom part 1. Insulating block 62,which is mounted into part 3 of the gentions which pass through saidwinding.'

iliaryV shaft'passes, and in which the plungers 58'and 59 are mounted,is provided with a connectiuffarrangement GB which leads `tothe'primarycoil, this arrangement comprising the stems G4 and G5 and thespring 7c 66, all as shown in Fig. 2.

I claim as new and desire to secure by Letters Patent l 1. Amagneto-generator comprising, incombination, a plurality of permanentmag- `.75 nets, a pair of pole-pieces in Contact with said magnets, saidpole-pieces having their polar faces curved in the arc of a circle, astationary generator winding arranged within the space between thepole-pieces, and means for guiding said winding into a predeterminedposition between the pole-pieces.

2. A magneto-generator comprising,` in combination, a plurality ofpermanent magnets, a. pair of pole-pieces in contact with said magnets,said polepieces having their polar faces curved in the arc of a circle,a stationary generator winding arranged Within the space between thepole-pieces, and a latch for securing said winding againstdisarrangement when in position between said pole-pieces,.said latchpermitting ready removal of the winding.

3. In a lmagneto-generator, the combination of a field-frame, astationary winding arranged axially within said field-frame, a rotatablearmature shaft passing through said winding-'to constitute the corethereof, the core-portion of the armature shaft'having a transverse slotfilled with laminations, and an inductor member removably securedl tosaid shaft ateither end of the winding for reversing the magnetic fluxtherethrough as the shaft is rotated.

4. In a magneto generator, a cylindrical magnetic armature shaft havinga transverse slot lled with coextensive lamina-i tions.

5. In a magneto-generator, the combina-- tion of a field-frame, astationary winding arranged axially within said field-frame, and arotatable armature for reversing the magnetic flux through said winding,said armature having a slot filled with lamina- 6. In amagneto-generator for ignition purposes, the combination of anon-magnetic base-portion, a pair of magnetic .sideportions secured tosaid base-portion and forming pole-pieces, a non-magnetic topportionsecured to said pole-pieces and provided With an opening, said fourportions' constituting a hollow framework, magnets in contact with saidpolepieces, a stationary induction-winding arranged within said 125framework, an unwound armature rotatable within said framework forreversing the magnetic flux through said winding, an in-

